EP 4170809 A1 20230426 - SECONDARY BATTERY AND TERMINAL
Title (en)
SECONDARY BATTERY AND TERMINAL
Title (de)
SEKUNDÄRBATTERIE UND ENDGERÄT
Title (fr)
BATTERIE SECONDAIRE ET TERMINAL
Publication
Application
Priority
- CN 202010598014 A 20200628
- CN 2021102850 W 20210628
Abstract (en)
This application provides a secondary battery, including at least one battery unit assembly. The battery cell assembly includes a positive electrode plate, a negative electrode plate, and a separator disposed between the positive electrode plate and the negative electrode plate, and the positive electrode plate and the negative electrode plate each include a current collector and an active material layer disposed on the current collector. An elongation rate of the separator is greater than 100%, the elongation rate of the separator includes an elongation rate in the length direction and/or an elongation rate in the width direction, a ratio of the elongation rate of the separator to a thickness of the active material layer of the positive electrode plate and/or negative electrode plate is 3.0%/µm to 8.0%/µm, and a ratio of the elongation rate of the separator to an elongation rate of the current collector of the positive electrode plate and/or negative electrode plate is greater than or equal to 60. In this embodiment of this application, the secondary battery may feature high safety while ensuring a high energy density. Embodiments of this application further provide a terminal including the secondary battery.
IPC 8 full level
H01M 50/494 (2021.01); H01M 4/13 (2010.01); H01M 4/66 (2006.01); H01M 10/052 (2010.01); H01M 10/054 (2010.01); H01M 10/058 (2010.01); H01M 10/42 (2006.01); H01M 50/46 (2021.01)
CPC (source: CN EP US)
H01M 4/13 (2013.01 - CN EP); H01M 4/5825 (2013.01 - EP); H01M 4/624 (2013.01 - EP US); H01M 4/66 (2013.01 - EP); H01M 4/661 (2013.01 - CN EP); H01M 4/667 (2013.01 - CN EP); H01M 10/04 (2013.01 - EP); H01M 10/052 (2013.01 - CN EP); H01M 10/0525 (2013.01 - EP); H01M 10/054 (2013.01 - CN EP); H01M 10/058 (2013.01 - CN EP); H01M 10/0585 (2013.01 - EP); H01M 10/42 (2013.01 - EP); H01M 10/4235 (2013.01 - CN EP); H01M 50/40 (2021.01 - EP); H01M 50/409 (2021.01 - EP); H01M 50/414 (2021.01 - EP US); H01M 50/417 (2021.01 - EP); H01M 50/423 (2021.01 - EP); H01M 50/426 (2021.01 - EP); H01M 50/451 (2021.01 - EP); H01M 50/46 (2021.01 - EP); H01M 50/463 (2021.01 - EP US); H01M 50/489 (2021.01 - EP); H01M 50/491 (2021.01 - EP); H01M 50/494 (2021.01 - EP); H01M 2004/021 (2013.01 - EP); Y02E 60/10 (2013.01 - EP); Y02P 70/50 (2015.11 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4170809 A1 20230426; CN 113937415 A 20220114; US 2023163417 A1 20230525; WO 2022001987 A1 20220106
DOCDB simple family (application)
EP 21834251 A 20210628; CN 202010598014 A 20200628; CN 2021102850 W 20210628; US 202218145749 A 20221222